我在用SPI来读写ST95040(EEPROM),搞了一天了,还是不对,SPI有数据输出,而95040一点反应也没有.不知道哪里出错,请搞过的兄弟们帮我看一看.哪里有错
误.
//三线制,MOSI MISO SCLK
void SpiInit(void)
{
SPIC1 = 0x5c; // Master mode, SPI enable.
SPIC2 = 0x00; //
SPIBR = 0x00; // 2MHZ
PTADD_PTADD7 = 1;// Out
}
unsigned char Read_SR(void)
{
unsigned char Tmp;
SPID = 0x05; //M95040 Read Stat Register
while (!SPIS_SPTEF);
Tmp = SPID;
while (!SPIS_SPRF);
return Tmp;
}
unsigned char EepromByteRead(unsigned int EepromAddr)
{
unsigned char Tmp;
SPID = 0x03; //M95040 Read Command
while (!SPIS_SPTEF);
SPID = EepromAddr; // M95040 Read Address
while (!SPIS_SPTEF);
Tmp = SPID;
while (!SPIS_SPRF);
return Tmp;
}
oid EepromByteWrite(unsigned char EepromAddr, unsigned char data)
{
SPID = 0x01; //M95040 Wrtie Stat Register
while (!SPIS_SPTEF);
SPID = 0x06; //M95040 Write Enable
while (!SPIS_SPTEF);
SPID = 0x02; //M95040 Send Write Command
while (!SPIS_SPTEF);
SPID = EepromAddr; //Send Writen Address
while (!SPIS_SPTEF);
SPID = data; //Writen 8 bit MSB
while (!SPIS_SPTEF);
}
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